Student Research Committee,School of Medicine,Babol University of Medical Sciences,Babol 47176-47745,Iran;
Department of Orthopedics,Babol University of Medical Sciences,Babol 47176-47745,Iran;
Department of Pathology,Faculty of Medicine,Babol University of Medical Sciences,Babol 47176-47745,Iran;
Biostatistics and Epidemiology Department,Medicine Faculty,Babol University of Medical Sciences,Babol 47176-47745,Iran;
Clinical Research Development Center,Shahid Beheshti Hospital,Babol University of Medical Sciences,Babol 47176-47745,Iran;
Platelet-rich; plasma; Hyaluronic; acid; Osteoarthritis; Knee; Pain;